I HAVE A 1990 VOLVO 740 TURBO. THE ALTERNATOR WAS REPLACED AND SO WAS THE BATTERY. IT STILL WILL NOT CHARGE UP. THERE ARE 2 WIRES LEADING FROM BACK OF THE ALTERNATOR TO SOMEWHERE ELSE. THE WIRES WERE FOLLOWED AND CONNECTED. MY SON SAYS IT IS SUPPOSE TO HAVE ANOTHER WIRE ON BACK OF THE ALTERNATOR. IS THIS MY PROBLEM? THE BATTERY AND ALTERNATOR WHERE CHECKED AND BOTH ARE GOOD. PLEASE HELP, I AM STRANDED.! THANKS!